package com.szmg.wishwalls.util;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.URL;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;

import net.sf.json.JSONException;
import net.sf.json.JSONObject;

import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.szmg.wishwalls.dto.WeChatAccessToken;
import com.szmg.wishwalls.dto.WeChatUserInfo;

/**
 * 公众平台通用接口工具类
 * 
 * @author liuyq
 * @date 2013-08-09
 */
public class WeixinUtil {
private static Logger log = LoggerFactory.getLogger(WeixinUtil.class);
public static String APP_ID = "wxc053aefd1dfd9fc1";
public static String APP_SECRET = "85475c558addb505bbe7b4845349489d";

private static String access_token_url = "https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=APPSECRET&code=CODE&grant_type=authorization_code";
private static String user_info_url = "https://api.weixin.qq.com/cgi-bin/user/info?access_token=ACCESS_TOKEN&openid=OPENID&lang=zh_CN";
private static String base_access_token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";
	/**
	 * 发起https请求并获取结果
	 * 
	 * @param requestUrl 请求地址
	 * @param requestMethod 请求方式（GET、POST）
	 * @param outputStr 提交的数据
	 * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
	 */
	public static JSONObject httpRequest(String requestUrl, String requestMethod, String outputStr) {
		JSONObject jsonObject = null;
		StringBuffer buffer = new StringBuffer();
		try {
			// 创建SSLContext对象，并使用我们指定的信任管理器初始化
			TrustManager[] tm = { new MyX509TrustManager() };
			SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
			sslContext.init(null, tm, new java.security.SecureRandom());
			// 从上述SSLContext对象中得到SSLSocketFactory对象
			SSLSocketFactory ssf = sslContext.getSocketFactory();

			URL url = new URL(requestUrl);
			HttpsURLConnection httpUrlConn = (HttpsURLConnection) url.openConnection();
			httpUrlConn.setSSLSocketFactory(ssf);

			httpUrlConn.setDoOutput(true);
			httpUrlConn.setDoInput(true);
			httpUrlConn.setUseCaches(false);
			// 设置请求方式（GET/POST）
			httpUrlConn.setRequestMethod(requestMethod);

			if ("GET".equalsIgnoreCase(requestMethod))
				httpUrlConn.connect();

			// 当有数据需要提交时
			if (null != outputStr) {
				OutputStream outputStream = httpUrlConn.getOutputStream();
				// 注意编码格式，防止中文乱码
				outputStream.write(outputStr.getBytes("UTF-8"));
				outputStream.close();
			}

			// 将返回的输入流转换成字符串
			InputStream inputStream = httpUrlConn.getInputStream();
			InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
			BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

			String str = null;
			while ((str = bufferedReader.readLine()) != null) {
				buffer.append(str);
			}
			bufferedReader.close();
			inputStreamReader.close();
			// 释放资源
			inputStream.close();
			inputStream = null;
			httpUrlConn.disconnect();
			jsonObject = JSONObject.fromObject(buffer.toString());
		} catch (ConnectException ce) {
			log.error("Weixin server connection timed out.");
		} catch (Exception e) {
			log.error("https request error:{}", e);
		}
		return jsonObject;
	}

	/**
	 * 获取access_token
	 * 
	 * @param appid 凭证
	 * @param appsecret 密钥
	 * @return
	 */
	public static WeChatAccessToken getAccessToken(String appid, String appsecret,String code) {
		WeChatAccessToken accessToken = null;

		String requestUrl = access_token_url.replace("APPID", appid).replace("APPSECRET", appsecret).replace("CODE", code);
		JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
		// 如果请求成功
		if (null != jsonObject) {
			accessToken = new WeChatAccessToken();
			try {
				accessToken.setToken(jsonObject.getString("access_token"));
				accessToken.setExpiresIn(jsonObject.getInt("expires_in"));
				accessToken.setRefreshToken(jsonObject.getString("refresh_token"));
				accessToken.setOpenid(jsonObject.getString("openid"));
				accessToken.setScope(jsonObject.getString("scope"));
				
			} catch (JSONException e) {
				accessToken.setErrcode(jsonObject.getString("errcode"));
				accessToken.setErrmsg(jsonObject.getString("errmsg"));
				// 获取token失败
				log.error("获取token失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg"));
			}
		}
		return accessToken;
	}
	
	/**
	 * 获取access_token
	 * 
	 * @param appid 凭证
	 * @param appsecret 密钥
	 * @return
	 */
	public static WeChatUserInfo getUserinfo(String token, String openId) {
		WeChatUserInfo userInfo = null;
		String requestUrl = user_info_url.replace("ACCESS_TOKEN", token).replace("OPENID", openId);
		JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
		// 如果请求成功
		if (null != jsonObject) {
			userInfo = new WeChatUserInfo();
			userInfo.setState("1");
			try {
				userInfo.setSubscribe(jsonObject.getString("subscribe"));
				userInfo.setOpenId(jsonObject.getString("openid"));
				if("1".equals(jsonObject.getString("subscribe"))){//已关注公众账号，才能获取其他信息
					userInfo.setNickName(jsonObject.getString("nickname"));
					if("1".equals(jsonObject.getString("sex"))){
						userInfo.setSex("male");
					}else if("2".equals(jsonObject.getString("sex"))){
						userInfo.setSex("female");
					}
					userInfo.setCity(jsonObject.getString("city"));
					userInfo.setCountry(jsonObject.getString("country"));
					userInfo.setProvince(jsonObject.getString("province"));
					userInfo.setLanguage(jsonObject.getString("language"));
					userInfo.setHeadImgUrl(jsonObject.getString("headimgurl"));
					if(StringUtils.isNotBlank(jsonObject.getString("subscribe_time"))){
						userInfo.setSubscribeTime(DateUtil.millisecondToDate(jsonObject.getLong("subscribe_time")));
					}
				}
			} catch (JSONException e) {
				userInfo.setState("0");
				userInfo.setMsg("errorCode!!token="+token+",,openId="+openId);
				userInfo.setErrcode(jsonObject.getString("errcode"));
				userInfo.setErrmsg(jsonObject.getString("errmsg"));
				// 获取token失败
				log.error("获取userInfo失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg"));
			}
		}
		return userInfo;
	}
	
	public static String getBaseAccessToken(String appid, String appsecret){
		String requestUrl = base_access_token_url.replace("APPID", appid).replace("APPSECRET", appsecret);
		JSONObject jsonObject = httpRequest(requestUrl, "GET", null);
		String token = "";
		// 如果请求成功
		if (null != jsonObject) {
			try {
				token = jsonObject.getString("access_token");
			} catch (JSONException e) {
				// 获取token失败
				log.error("获取token失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg"));
			}
		}
		System.out.print("---------------------Token==="+token);
		return token;
	}
}